Features: How To Use: First Put The Cylindrical Part Of The Chin Exerciser Into Your Mouth, Then Exhale And Inhale Slowly With Your Mouth. After That, You Can Feel The Lift Of Your Face. It Is Recommended To Use It For 30-40 Seconds Each Time, 3-4 Times A Day. Warm Tip: After Opening The Package Of The Face Exerciser, Please Rinse It With Warm Water, Then Start Using It. Please Remember, Do Not Soak It In Boiling Water, Or It Will Be Spoiled Or Malfunctioning. Specifications: Material: Abs And Silicone Color: Pink And Purple Size: About 6.5 X 3.6 X 3.6 Cm/ 2.56 X 1.42 X 1.42 Inches Package Includes: 4 X Jawline Exerciser Notes: Manual Measurement, Please Allow Slight Errors On Size. The Color May Exist A Slight Difference Due To Different Screen Displays.